Borate of hexamethyleneamin and process of making same.



amin.

UNITED STATES PATENT onnrcn.

OTTO MANKIEWICZ AND JULIUS ALTSGHUL, OF

BERLIN, AND WILH ELM URBAN, OF WIL- MERSDORF, NEAR BERLIN, GERMANY, AssIoNons To ACTIEN eEsELLsonAF'rFUr ANILIN FABRIKATION, or WILMERSDORF, NEAR BERLIN, GERMANY.

' BORATE OF HEXAMETHYLENEAMIN AND PROCESS OF MAKING SAME.

' Specification of Letters Patent.

Patented Oct. 29, 1907.

Application filed August 11. 1906- Serial No. 330,266.

To all whom it may concern:

Be it known thatwe, O'rro Manxrswicz, Jumos AL'i'scnUL, and WILHELM UREAN, the former two of Berlin, the latter of Wilmersdorf, near Berlin, in the Kingdom of Prussia, German Empire, have invented new and useful Improvements in New Borates of Hexamethyleneamin and Processes of Making the Same; and we do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it appertains to make and use the same.

Little has been known hitherto about the salts of boric. acid with organic bases; no borates have yet been describedot' methylamin, dimethylamin or trimethylamin and there is only known a tetraborate of anilin- (compare Ditte, Jahresberichte fiber die Fortsrhritte rIer Che'rm'e, 1887, page 886). Ammonia itself yields no normal borates but only compounds with very small percentage of the base (compare Graham Otto, Anorgumsrhe Uhemia, Braunschweig 1884, V. AufL, III. Abteilung, page 497).

We have now found that now valuable borates can be obtained by the action of boric acid on hex-.uncthylcne- The combination of the two compounds can be performed by thoroughly mixing the same or by causing them to react in an aqueous or alcoholic solu- The composition of the boratcs obtained varies for iiou. according to the proportion of the components; every molecule df boric acid which combines with one molecule of he xamcthyleneaniin one molecule of water is split off. it appears therefore that the new boratcs 0f hexamethylcneamin are dci .vutivcs of lneta-boricacid as their composition corresponds to the general formula: (UH. N,.(.HBO In the manner described one to tour molecules of boric acid can be combined with one molecule of heXamethylencamin.

The following examples may serve to illustrate our invention; the parts being by weight:

Example 1: 62 parts of boric acid hnd' 140 parts of hexamcthyleneamin are very thoroughly mixed by grinding them together. The mass soon becomes crumbling on account of the formation of water by the combination of the ingredients. It is then reduced to dryness by heating it at about to ccntigrade.

The product thus obtained contains about 33 per cent. of boric acid (calculated as H 80 and about 30 per cent. of nitrogen. it appears therefore that the product has the composition corresponding to the formula:

tion: I

Example 2: If 124 parts of boric acid and 140 parts of hoxamethyleneamin are treated as described in ex ample 1, the reaction product after being dried contains about 54 7;; of boric acid and 61 per cent. of hexamethyleneamincorresponding to the formula:

this reaction being illustrated by the following equa- I Example 3: When combining in'186 parts of boricacid and 140 parts of hcxamothyleneamin in the manner described in Example 1, aproduct is obtained which contains about (58 per cent. of boric acid and 51 per cent. of hexamethylencamin (the percentage of boric acid being calculated on 11 130 This product corresponds to the formula: (CH N .(HBO

Example 4: By using in the process described in Example l, 248 parts of boric acid and 140 parts of hexamcthylcncan'rin there is obtained a hexam ethyleneaminboratc, the composition of which corresponds to the formula: (CH N,,.(HBQ

Example 5: 13 parts of boric acid are dissolved in 160 1 parts of hot alcohol of 96 volume per cent. strength and to this solution are added 28 parts of hexarnethyleneamin. The latter having dissolved the liquid is filtered and allowed to cool. The reaction product then separates in the shape of colorless crystals which after drying possess the composition corresponding to the formula: am-( 02).

Example 6: 62 parts of boric acid in 140 parts of hexamethylcneamin are dissolved togetherin 300 parts of water and the solution is filtered. When this solution is evaporated to about hof its weight prismatic crystals are separated which in the dry state correspond to the formula: (CH N,,.(HBO

The new boratcs of hoxamcthylcneamin obtained according to our invention as set forth, are colorless or white substances of weakly acid reaction, readily soluble in water, sparingly soluble in alcohol, insoluble in other. They decompose without melting on being heated in the dry state giving off alkaline vapors, the smell of which resembles that of methyl-amin. When heated with diluted sulfuric acid the new boratcs split off formic aldehyde, the resulting solution developing ammonia on boiling with an excess of soda-lye. When the new borates are mixed with alcohol and the alcohol is lighted, the flame remains uncolored at first and only after some time when decomposition sets in the green "ic acid flame is'producod, which, however, is at once obtained on addition of sulfuric acid to the above mixture. i I

The new borates of hexilmeth ylamin are valuable internal remedies a's'they are free from the irritatingeffects often observed when using hexarnethyleneamin itself.

Having now described our invention and the manner in which the some is to he performed what we claim 1. The process for the production of new horates of hexnmethyieneamin which consists in reacting on hexamethyleneamin with horic acid.

2. As a new article of manufacture the new boretes of.

hexamethyleneamin which can he obtained by the action of boric acid on hexurnethyleneztmin as above set forth,

being colorless or white substances of weekly acid reaction, easily soluble in water. sparingly soluble in alcohol, insoluble in ether. which decompose without melting when heated in the dry state. which on heating; with dilute sulfuric acid split off formic aldehyde, the resulting solution developing umm'onia when boiled witlran excess of soda lye, which bomtes when mixed with alcohol and the alcohol being lighted, leave the flame at first uncolored, whereas on addition of sulfuric acid to the mixture they yield at once the green horic acid flame.

3, As a new article of manufacture the new borate of hexumethyieneuniin which may he obtained by thorougly mixing one n mlecular quantity of hexamethylenearnin with the mixture it yields at once the green boric acid flame and which norate contains about 68 per cent. of boric acid (calculated as H BOQ-anG 51 per cent. of hexamethyieneamin corresponding to the formula: (CH N .(HBO2)S.

In witness whereof we have hereunto signed our names 0 this 27 day of July 1906, in the presence of two subscribing Witnesses.

own) ANKiEwmz. JULIUS ALTSCHUL. WILHELM URBAN.

Witnesses iinNnr Hnspnn, WILLIA 3i MAYNER. 

